The Danes were losing the battle for Estonia, their knights being held back by Estonian farmers at the place where the wall now stands. They had to get up the hill and into the flag tower which would signify their victory, but they couldn’t break through the defences put up by the locals. They’d all but given up when a flag, red with a white cross, fell from the heavens. Inspired by the sign from their god, they doubled their efforts and broke through to conquer Estonia. The flag remains their national symbol to this day.